US2806862A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing 10-hydroxy-4-estrenes
Assignee: Pharmacia and Upjohn Co
•
Filing: 1955-11-21
•
Granted: 1957-09-17
•
Expires: 1975-11-21
Abstract
No abstract record available.
Inventors
- 👤 Raymond L Pederson
- 👤 John C Babcock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:21
CPC Classifications
C; C07; C07J; C07J1/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
24 words
A PROCESS WHICH COMPRISES: TREATING 178-HYDROXY5(10)-ESTREN-3-ONE WITH OSMINUM TETROXIDE AND HYDROLYZING AND DEHYDRATING THE THUS PREPARED OSMATE WITH AN ALKALI REAGENT TO OBTAIN 10,17B-DIHYDROXY-4ESTREN-3-ONE
Claim 2
Dependent Claim
24 words
A PROCESS WHICH COMPRISES: TREATING 178-HYDROXY5(10)-ESTREN-3-ONE WITH OSMINUM TETROXIDE AND HYDROLYZING AND DEHYDRATING THE THUS PREPARED OSMATE WITH AN ALKALI REAGENT TO OBTAIN 10,17B-DIHYDROXY-4ESTREN-3-ONE
References Cited (Backward Citations)
US2729654A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-16 | 1961-03-18 | 1961-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-16 | 1965-03-18 | 1965-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-16 | 1969-03-18 | 1969-09-17 | $7700.00 | Window Closed / Lapsed |